I assumed that the foot that unscrews was stainless steel, nay ... After unscrewing the base of the plunger rod, a small tour in the dishwasher because there were rolled up and glued on fiber. Surprise! Jai daluminium stood a blackened piece and totally stripped of his brilliant layer, stainless way. (I picture if you're interested). Jai serious doubts as to the long term performance of this foot stainless wrong. Moreover, one can imagine that this way can dissolve in a somewhat acidic or basic food. To be continued ...